preprocess: require('svelte-preprocess')({
              sourceMap: false,
              postcss: true,
              scss: {
                prependData: '@import "./src/assets/scss/settings.scss";',
                renderSync: true
              },
              babel: require('../babel.config')
            })

Tabs has unused export property 'TABS'. If it is for external reference only, please consider using `export const TABS`

<script context="module">
  export const TABS = {}
</script>

<script>
  import { setContext, onMount, onDestroy, createEventDispatcher } from 'svelte'
  import { writable } from 'svelte/store'
  import { uid } from '@/utils'

  export let index = 0

  let tabs = []
  let panels = []
  let activeTab = writable(null)
  let activePanel = writable(null)